Island



July 3, 1923.

C. F. HAUSSLER ET ALL INDUGTOR FOR GAS BURNERS Filed May a m m &

. `Patented July 3, 1923.

UNITED STATES PATENT FFicE. l

CARL` IE'.v HAUSSLER AND NICHOLAS W. PARK, OF PROVIDENCE, RHODE ISLAND, AS-

SIGNORS TO THE GENERAL FIRE EXTINGUISHER COMPANY, OF' PROVIDENCE, l RHODE ISLAND, A CORPORATION OF NEW YORK.

murieron ron ens Bonuses.

Application' med May s,

T all whom t may concern Be it lrnown that we, CARL F. l-lAUssLnn and NIorroLAs WV. PARK, citizens of the United States, both residing at Providence,

in thecounty of Providence and State of Rhode Island, have invented certain new and useful Improvements in lnductors tor Gras Burners, of whichthe following is a specification.

o Thisinvention relates to improvements in inductors forgas burners. It is for con- L venience hereinyreferred tofin terms of air and ordinary illuminating gas used for heating, althoughiit is applicable to the combination of anyjtwo lgases for combustion. More particularly it relates to means for supplying air under pressure to the gas in such manner as `to providecertain, adequate and properly proportioned supply for the coinbustion, especiallyfin cases where the whole of the air for combustion is to be supplied as prim'ary7 air.l

" One object of the invention is` to provide apparatus for obtaining such suitable coordination of air supply and gas supply in cases where the `air is taken from any source under pressure andl to do so by simple and inexpensive means. Another object is to pro vide such means which can be applied to an existing burner without extensive or eX- pensive changes.

The ob 'ects are accomplished by providing means to produce an envelope of air under pressure about the burner pipe,A with openings for the induction of air thereinto Jtrom the envelope in ets whose rate is controlled by a valve which is mechanically and operatively connected with the gas valve. A gradual opening may be provided, corresponding 40 to graduated opening of the gas valve, account beingta'ken of the relative pressure of air in the envelope and gas in the pipe.

rA specific embodiment of the invention is illustrated, in which the air envelope is con-` stituted by a simple hollow cylinder enveloping the supply end ofthe burner pipe and, in o the preferred form, enveloping also the gas valve, which cylinder is a continuation of the pipethrough `which Vair comes from the source of supply. If it be desired to improve the action of an atmospheric burner to which t no supply of compressed .air is conveniently available, the apparatus may include a sim- 1920.' serial No. 379,747.

ple blower whose delivery pipe constitutes rthe said air envelope.

The invention may be embodied in forms other than those herein described. It is intended that the patent shall cover, by suitable expression in the appended claims, whatever 'features of patentable novelty exist in the inventiondisclosed. In the accompanying drawing,

Figure l is a medial section which may be considered to be an elevation through apparatus embodying the invention; Figure 2 is a plan of a detail of the same, with: the enveloping part removed.

Figure 3 is an end elevation of the same in section on the line 3 8 of Figure 2. l

Figure 1 is a side elevation of a modification; and

Figure 5 is a `side elevation oi' another modification.

Referring to the drawings, 10 indicates a gas supply pipe leading thro-ugh a coclrll having handle 12'to a gasdischarge orifice 13, at the supply end oi a burner tube 141. The lattermay be assumed to extend to the left from Figure 1, conducting air and` gas i readytor combustionto burner oriiices (not shown) of any desired or suitable style. The burner tube is tightly closed by a tubular bushing or fitting constituting a sort of vestibule 15, within which is' the gas inlet 13 and through the walls of which are openings '16 for air induction from the surroundn ing envelopeof air contained within the cylindrical chamber 17. This chamber, as represented, consists of a tubular casting of relatively large diameter, closed at one end by a removable stopper or head 18and at the other by an end wall. The latter is periorate, to accommodate the bushing which constitutes the vestibule piece 15. Through the sides ot' this chamber are two holes, one for the stem of the gas cock 12 and the other for the incoming gas pipe 10; and through the head 18 is the entrance vfor compressed air from a pipe The chamber is 'conveniently arranged to receive the stem ofthe gas cock by providing a removable plate 17L at its top having a sizable hole 171J through which the stem of the coclr 11"may pass with a sleeve 17c `fitting it and serving as a bearing 'for it and having a flange 17d adapted to engage the inner side ofthe plate and pro presse vided with a screw on which a nut 17e may be run upl as a clamp against an outer, face of this plate 17a. T he protruding parts and the openings for them may be otherwise arranged, or even may be omitted, as may be mostconvenient, suitable means of -some sort being rovidedfor the induction of comd) air to the chamber 17 andl of gas to the cock 11. The vestibule bushing 15, in the form of the invention which is illustrated in the drawing, sleeve 21, which is adjustable and is placed andis movable so as to cover or uncover the induction inlets 16, which may be several in number, at intervals around. The sleeve 21 thusgconstit'utes a valve'whose arrangement vfor operation is best seen in Figure 2. A link \22`i's"provided1for attaching it to an arm projecting for the purpose from the stemv of thega's cock '11. The cylindrical valvev 2lV is vso arranged that when the gas cock is'in-its closed position the holes'are also invtheir closed condition, but so thatwith the turning of the gas cock the cylindrical valve 21 is moved exposing the .holes 1'6" therein and thus making an opening through which air will flow in jets fromthe pressure envelope supply. These holes may beldimensioned and arranged so as to produce any desired degree of open-ing for air induotionat each stage of opening or the gas'cock 11 and will naturally beA proportioned with regardv to the pressure of air in `the chamber 17, to limit the jetting of air therefrom into the vestibule to the desired effect.l `In arrangement illustrated they are holes of'e ual size drilled in an oblique row y and slight y overlapping each other.

In the apparatus illustrated in Figure 1 theconnection from an available supply of `air under pressure is indicated by the Pipe Figure 4 i illustrates a modification in which in place of the disk'wall 18 and air supply 20 there is substituted the discharge pipe 30 of an air blower 31 of any suitable type. Thechamber 17 thus becomes practically a part of the discharge pipe 30 of the blower,y it being contemplated that the stages of gas valve opening, resulting from the working pressure of air, makes a notable increasey of efiiciency over some apparatus now inA` common use.

r' Figure 5 illustrates another modification,

' which for convenience is illustrated as being f of the type of' Figure 1 in that it has connection for air from al remote compressor.

carries a cylindrical4 In this the chamber 17 does not cover the gas pipe and valve 10, l11, but the end stopper or head18 fits upon `the cylindrical air valve 21.

The construction and operation of the apparatus is independent of particular gaseous material with which it is worked, 'the terms gas and air herein being typical of any two gases which unite in combustion and not constituting limit-ations of the metallic structure nor of the range of gaseous material with which it may be used.

It will be observed that the vestibule 15 is essentially a part of the burner tube 14 although in the structural form represented it is a. separate piece of metal, being conveniently formed as a sort of bushing which helps clamp together the burner tube and the enclosing air chamber 17. It is therefore inthe claims spoken of as being a part of the tube, meaning the burner tube;` and it wouldnot be the less so if there happened to be some restriction or, some greater length or different shape between it and the place where the burning actually occurs for its function is to provide means for suitable coordination between the gas supply and the air supply, prior tofcombustion, by simple means where the air is under preure.

We claim as our invention:

1. Apparatus for mutually adapting atmospheric air and gas for combustion, comprising the combination, with a pipe supplying the gas under pressure and having restricted discharge, of a burner tube receiving the discharge of the gas supply pi e and connected thereto by a tightjoint excliiding atmospheric air;l an air chamber through which. all of the primary air plles, enveloping a part of the burner tube and having restricted discharge opening into the burner tube; and meansA to compress atmospheric air and to supply it under pressure to the enveloping chamber; whereby, by taking account of' the relative pressures and discharge openings, and of the expansion of gas and air therefrom into the burner tube, the rellf tive constituents of gas and air in the mixture can be adapted for perfect combustion according to a predetermined standard.

2. Apparatus for mutually adaptingV atmospheric air and gas for combustion, comprising the combination, with a pipe and valve supplying the gas under pressure., of a burner tube connected to the gas supply pipe by a tight joint excluding atmospheric air; an air chamber throughV which all of the primary air passes, enveloping a part of the burner tube and having discharge intoV the burner tube with valve graduating its opening; means to compress atmospheric air and to deliver it, under` pressure to the chamber; and interconnection between thev two valves, whereby the sizes of the discharge openings vary simultaneously and the expansion 0f gas and air therefrom into the burner tube maintainsthe relative constituents of gas and air in the mixture approximately in predetermined proportions.

3. Apparatus for mutually adapting atmospheric air and gas for combustion, comprising the combination, with a pipe and valve supplying the gas under pressure, oit' a burner tube connected to the gas supply pipe by a tight joint excluding atmospheric air; a rotary blower, through which all of the primary air passes, having a. discharge pipe which envelopes a part of the burner tube; there being in the burner tube an opening with valve permitting iiow oi air l'from the blower discharge tube into the burner tube; interconnection between the two valves, whereby they move simultaneously and the expansion of gas and air therefrom into the burner tube maintains the relative constituents of gas and air in the mixture approximately in predetermined portions.

4. An inductor comprising a burner tube having an axial inlet for gas and a peripheral inlet for air; an enveloping tube adapted to hold air under pressure at said peripheral inlet; and interconnected means for controlling said inlets simultaneously, including a tubular valve slidable along said burner tube to open or close said peripheral inlet.

5. An induct-or comprislng a burner tube having an inlet for gas under pressure; a

` peripheral inlet for air under pressure further along the tube; a sleeve valve movable over the tube to close said peripheral inlet; a chamber enveloping said peripheral inlet and sleeve and adapted to hold air under pressure; and interconnected means for controlling flow of supplies to said two inlets.

6. An inductcr comprisingr a tube adapted to conduct mixed gas and air to a burner; a chamber fixed against the inlet end of the tube; a flanged bushing within the chamber and passing through its wall into the end of the tube clamping these three parts together;

there being openings into said bushing 'for admission of gas under pressure and for admission of air under pressure, the latter being through the sides of the bushing from said chamber and having means movable over the outside of the bushing to close the opening gradually; gas control means for closing the gas supply gradually; and interconnection between said closing means whereby their action is co-ordinated.

7. An inductor comprising a chamber and means for admitting compressed air thereto; a gas pipe entering the chamber and forming a conduit therein for gas; a tube having a portion within the chamber, closed except :for admission openings for said gas from the conduit and for said air within the chamber, and leading out from the chamber to conduct away the mixed gas and air; and interconnected control means for the air and gas passages into said tube.

8. An nductor comprising a chamber and means for admitting compressed air thereto; a gas pipe entering the chamber and torming a conduit therein for gas; a tube having a portion within the chamber, closed except for admission openings for said gas from the conduit and ior said air within the chamber, and leading out from the chamber to conduct away the mixed gas and air; a cock in the gas pipe within the chamber; a movable plate comprising a part of the chamber wall through which the stem of the gas cock protrudes; a cylindrical bearing lor the stem, surrounding the stem and secured to said plate, preventing air leakage from the chamber; and a movable part on the tube adapted to close the air passage 4from the chamber into the tube and operatively connected with said gas cock within the chamber.

Signed at Providence, Rhode Island, this fourth day of May, 1920.

CARL F. HAUSSLER. NICHOLAS W. PARK. 

